Designing coded feedback for efficient network coding based opportunistic routing
Dimitrios Koutsonikolas, Chih-Chun Wang, Y. Charlie Hu · ACM SIGMOBILE Mobile Computing and Communications Review · 2010
A fundamental challenge faced by network coding (NC)-based opportunistic routing (OR) protocols is determining how many coded packets each forwarding node (FN) should transmit. Existing protocols address this challenge by combining NC with offline loss rate based heuristics to eliminate the overhead of feedback exchange, often at the cost of reduced performance in dynamic wireless environments. In this paper, we present a novel solution to this challenge through the design of the CCACK protocol. CCACK introduces an online Cumulative Coded ACKnowledgment scheme which allows the protocol to sustain high performance in dynamic wireless environments, with practically zero overhead.